Can a snail reproduce or appear from plant in fresh water tank?

It's extremely unlikely that a snail would appear in your freshwater tank from the plant itself. Here's why:

* Snails need eggs: Snails reproduce by laying eggs, and these eggs need a suitable environment to hatch. Plants alone don't provide that environment.

* Snails need moisture: Even if eggs were present on a plant, they would need consistent moisture to develop. While a tank is wet, it's not the same as being submerged in water.

* Snails need food: Snail hatchlings need to eat to grow, and plants alone aren't enough to sustain them.

How Snails Get Into Tanks

* Hitchhikers: The most common way snails enter a tank is by being accidentally introduced with plants, decor, or even on the surface of water.

* Snail eggs: Snail eggs can be very small and difficult to spot. They can be on plant roots, on rocks, or even on the tank itself.

What to do if you find a snail:

* Identify the species: Some snails are beneficial, while others can be invasive and harmful to your tank. Do some research to identify the snail.

* Control the population: If you have unwanted snails, there are ways to control their population, such as using snail traps or introducing snail-eating fish.

Remember, it's always best to quarantine new plants and decor before introducing them to your main tank to prevent unwanted snails or other pests.